<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <link rel="stylesheet" href="./index6.css">
</head>
<body>
    <div class="box">
        <div class="box-item grow">1<div>(flex-grow: 1)</div></div>
        <!-- <div class="box-item grow-2">2<div>(flex-grow: 2)</div></div> -->
        <div class="box-item">2<div>(width: 200px)</div></div>
        <div class="box-item grow">3<div>(flex-grow: 1)</div></div>
    </div>
</body>
</html>